Which role is responsible for approving non-Navy chambers as level 2 or level 3?

The Commanding Officer (CO) is responsible for approving non-Navy chambers as level 2 or level 3. This authority is essential for ensuring that all operational capabilities align with specific training and safety standards within the Navy's diving and hyperbaric programs.

The CO's role involves oversight and decision-making that ensures only chambers meeting the required standards and regulations can be classified at these levels, which are critical for the safe execution of diving missions and training exercises. This responsibility reflects the CO's broader command authority in managing resources and ensuring the safety and effectiveness of their unit.

In contrast, while the Chief of Naval Operations (CNO), Senior Diver, and Training Officer all play important roles in various aspects of Navy operations and training, they do not directly oversee the approval process for non-Navy chambers. The CNO's focus is on the overall strategic direction and policies of the Navy rather than individual chamber approvals. The Senior Diver may provide expertise and guidance on diving operations but does not have the authority to approve chambers. The Training Officer is primarily responsible for the training curriculum and activities but is not involved in the certification of equipment.